Obtaining User Authorities

When roles are synchronized in accordance with LDAP, they are obtained in a few steps:

  • Obtaining roles from groups a user is a member of

    The resulting list of authorities consists of group names a user is a member of. By default, the cn attribute of the group is used to obtain the authority name. You can change this attribute in the jmix.ldap.group-role-attribute.

  • Obtaining roles from user attributes

    Optionally user roles can be added based on their own attributes.

    Register a Spring bean, that implements the LdapUserAdditionalRoleProvider interface and implement the getAdditionalRoles() method within this bean. For example:

    @Component("demo_MyLdapUserAdditionalRoleProvider")
public class MyLdapUserAdditionalRoleProvider implements LdapUserAdditionalRoleProvider {

    @Override
    public Set<GrantedAuthority> getAdditionalRoles(DirContextOperations user, String username) {
        return new HashSet<>();
    }
}

  • Applying default roles

    The jmix.ldap.default-roles property contains a comma-separated list of roles that will be assigned to every user authenticated in LDAP.

The resulting list of authorities is passed through JmixLdapGrantedAuthoritiesMapper in order to get the final collection of authorities. This mapper is used to map previously obtained authorities to Jmix GrantedAuthority.

For example, consider that the initial list contains a simple authority with the value of Administrators. First, the mapper tries to find a resource role with the same role code. If the role hasn’t been found, it searches for a row-level role with the same code. If the role isn’t found, it won’t be added to the final list.

Also, you can implement the LdapAuthorityToJmixRoleCodesMapper interface to map LDAP authorities and Jmix role codes. It is available to map several role codes to one LDAP group. Roles can be either resource or low-level.

In the example below, the bean implements mapping the mathematician and scientists LDAP groups to Jmix role codes:

@Component("l_CustomAuthorityMapperBean")
public class CustomAuthorityMapperBean implements LdapAuthorityToJmixRoleCodesMapper {

    @Override
    public Collection<String> mapAuthorityToJmixRoleCodes(String authority) { (1)
        Collection<String> roleCollection = new ArrayList<>();
        if (authority.equals("mathematicians")) { (2)
            roleCollection.add("system-full-access");
        } else {
            roleCollection.add(authority + "-resource-role"); (3)
            roleCollection.add(authority + "-row-level-role");
        }
        return roleCollection;
    }
}
1 Overrides the method that takes an LDAP authority as input parameter and returns a collection of role codes that matches the given authority.
2 In case of the mathematicians group, an LDAP user obtains the system-full-access role.
3 In case of the scientists group, an LDAP user obtains two roles: scientists-resource-role and scientists-row-level-role.